Lenovo ThinkPad X220 Service Manual PDF
I love my Lenovo X220, it truly is a superb computing machine 🙂
If you are going to add an mSATA drive or other somewhat in-depth upgrades, you may want to checkout the service manual for the X220. It is comprehensive and nicely formatted. Color photos would be nice but the black and white diagrams are sufficient.
Official Lenovo X220 service manual: dl link as of 2012.01.17